Ask AI: what if the Russian Empire instead of joining Serbia during 1914 didn't care and let Austria-Hungary invade it?

If the Russian Empire had not joined Serbia during 1914, it is likely that Serbia would have been defeated and absorbed into the Austro-Hungarian Empire. The resulting lack of a Russian ally would have caused the Triple Entente—an alliance between France, the United Kingdom, and Russia—to become weaker and less able to confront the Central Powers. This could have led to the Central Powers gaining more territory earlier in the war, resulting in a much different outcome.